marked by quiet and caution and secrecy; taking pains to avoid being observed; "a furtive manner"; "a sneak attack"; "stealthy footsteps"; "a surreptitious glance at his watch"
not to be placated or appeased or moved by entreaty; "grim determination"; "grim necessity"; "Russia's final hour, it seemed, approached with inexorable certainty"; "relentless persecution"; "the stern demands of parenthood"
lacking excess flesh; "you can't be too rich or too thin"; "Yon Cassius has a lean and hungry look"-Shakespeare
(of sound) lacking resonance or volume; "a thin feeble cry"
lacking spirit or sincere effort; "a thin smile"
of relatively small extent from one surface to the opposite or in cross section; "thin wire"; "a thin chiffon blouse"; "a thin book"; "a thin layer of paint"
relatively thin in consistency or low in density; not viscous; "air is thin at high altitudes"; "a thin soup"; "skimmed milk is much thinner than whole milk"; "thin oil"
not as expected; "there was something fishy about the accident"; "up to some funny business"; "some definitely queer goings-on"; "a shady deal"; "her motives were suspect"; "suspicious behavior"
of or relating to or resembling fish; "the soup had a fishy smell"
lacking in light; not bright or harsh; "a dim light beside the bed"; "subdued lights and soft music"
lacking clarity or distinctness; "a dim figure in the distance"; "only a faint recollection"; "shadowy figures in the gloom"; "saw a vague outline of a building through the fog"; "a few wispy memories of childhood"
make dim or lusterless; "Time had dimmed the silver"
become dim or lusterless; "the lights dimmed and the curtain rose"
switch (a car's headlights) from a higher to a lower beam